initial commmit for functions part1 fro global scaling and accuracy assessment

splitting code for script part global assessment of accuracy, removing functions

NEX global assessment run 10 1000x3000km tiles part1

paper proof multi-timescale Figure 11 modifications

subsampling script, major modifications to solve issues related to North America runs

data preparation script, modifications to solve subsampling issue in North America

data preparation adding subsampling for daily stations

run 10 assessment of reg2 and reg6 with generation of mosaics for 1000x3000

NEX assessment minor changes

run 10 NEX assessement generation of mosaics images and automated copy back to server